build

Compiler: remove some deadcode #3183

Job	Run time
lint-fmt	6m 20s
lint-opam	7m 42s
lint-runtime	8s
build (ubuntu-latest, 4.08, true, true, true)	6m 42s
build (ubuntu-latest, 4.09, true, true, true)	6m 41s
build (ubuntu-latest, 4.10, true, true, true)	7m 10s
build (ubuntu-latest, 4.11, true, true, true)	6m 29s
build (ubuntu-latest, 4.12, true, true, true)	6m 28s
build (ubuntu-latest, 4.13, true, true, true)	6m 12s
build (ubuntu-latest, 5.0, true, true, true)	3m 19s
build (ubuntu-latest, 5.1, true, true, true)	7m 16s
build (ubuntu-latest, 4.14, true, false, true)	10m 43s
build (ubuntu-latest, ocaml-variants.4.14.2+options,ocaml-option-32bit, true, false, true)	7m 52s
build (macos-latest, 4.14, true, false, true)	12m 42s
build (windows-latest, 4.14, true, false, true)	23m 54s
build (ubuntu-latest, 5.2, false, false, false)	17m 25s
build (ubuntu-latest, ocaml-variants.5.2.0+options,ocaml-option-32bit, true, true, true)	7m 44s
build (macos-latest, 5.2, true, false, true)	12m 25s
build (windows-latest, 5.2, false, false, true)	31m 24s
	3h 8m 36s

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